feat: consistent compact density across all list views

- Reduce capture-item, files table, date group labels to 6px 12px padding
- Set font-size 0.80rem on capture-text, file table cells

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

templates/appointments.html

@@ -22,7 +22,7 @@
         {% set appt_date = appt.start_at.strftime('%A, %B %-d, %Y') if appt.start_at else 'No Date' %}
         {% if appt_date != current_date.value %}
             {% if not loop.first %}</div>{% endif %}
-            <div class="date-group-label" style="padding: 12px 12px 4px; font-size: 0.78rem; font-weight: 600; color: var(--muted); text-transform: uppercase; letter-spacing: 0.04em; {% if not loop.first %}border-top: 1px solid var(--border); margin-top: 4px;{% endif %}">
+            <div class="date-group-label" style="padding: 6px 12px 4px; font-size: 0.78rem; font-weight: 600; color: var(--muted); text-transform: uppercase; letter-spacing: 0.04em; {% if not loop.first %}border-top: 1px solid var(--border); margin-top: 4px;{% endif %}">
                 {{ appt_date }}
             </div>
             <div>